TW200637067A - Tag antenna - Google Patents

Tag antenna

Info

Publication number
TW200637067A
TW200637067A TW094145238A TW94145238A TW200637067A TW 200637067 A TW200637067 A TW 200637067A TW 094145238 A TW094145238 A TW 094145238A TW 94145238 A TW94145238 A TW 94145238A TW 200637067 A TW200637067 A TW 200637067A
Authority
TW
Taiwan
Prior art keywords
inductance
antenna
chip
rolled
feeding part
Prior art date
Application number
TW094145238A
Other languages
Chinese (zh)
Other versions
TWI311385B (en
Inventor
Manabu Kai
Toru Maniwa
Takashi Yamagajo
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Publication of TW200637067A publication Critical patent/TW200637067A/en
Application granted granted Critical
Publication of TWI311385B publication Critical patent/TWI311385B/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
    • H01Q1/2225—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/07773—Antenna details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/20—Two collinear substantially straight active elements; Substantially straight single active elements
    • H01Q9/24—Shunt feed arrangements to single active elements, e.g. for delta matching
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
    • H01Q9/285—Planar dipole

Abstract

A dipole part of a length shorter than half of an antenna resonance wavelength is placed so as to be rolled and enables a feeding part 11 to feed a chip. An inductance part 12 for adjusting the inductance of the antenna is provided so as to sandwich the feeding part 11. The inductance 12 is provided using an empty space of the inside of the rolled dipole part. By providing the inductance part 12, the inductance of the antenna can be adjusted so as to resonate at a predetermined frequency with the capacitance of the chip connected to the feeding part 11. At this time, although the radiation resistance of the antenna becomes extremely large according to calculations, it is actually almost the same as the resistance of the chip due to loss, and the power received by the antenna can be provided to the chip.
TW094145238A 2005-03-17 2005-12-20 Tag antenna TWI311385B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005076492 2005-03-17
JP2005302210A JP4330575B2 (en) 2005-03-17 2005-10-17 Tag antenna

Publications (2)

Publication Number Publication Date
TW200637067A true TW200637067A (en) 2006-10-16
TWI311385B TWI311385B (en) 2009-06-21

Family

ID=36586128

Family Applications (1)

Application Number Title Priority Date Filing Date
TW094145238A TWI311385B (en) 2005-03-17 2005-12-20 Tag antenna

Country Status (5)

Country Link
US (2) US7659863B2 (en)
EP (1) EP1703589A1 (en)
JP (1) JP4330575B2 (en)
KR (1) KR100767568B1 (en)
TW (1) TWI311385B (en)

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Also Published As

Publication number Publication date
JP2006295879A (en) 2006-10-26
US20060208955A1 (en) 2006-09-21
US20070268194A1 (en) 2007-11-22
KR20060101204A (en) 2006-09-22
US7659863B2 (en) 2010-02-09
EP1703589A1 (en) 2006-09-20
JP4330575B2 (en) 2009-09-16
TWI311385B (en) 2009-06-21
KR100767568B1 (en) 2007-10-17

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